FIELD OF THE INVENTION
[0001] The invention generally relates to handles for razors, more particularly to handles
with movable portions, the handles comprising a benefit delivery assembly.
BACKGROUND OF THE INVENTION
[0002] Since the invention of the safety razor in the 1850's, four main design architectures
of razors- the safety razor, the disposable edge safety razor, the modem cartridge
system razor, and the disposable razor - have dominated the market. During this time,
both the razor handle and the razor cartridge/blade provide benefits to the shaver.
[0003] In the last fifty years, the premium wet shave market has been dominated razors using
replaceable cartridges, which are the only component that touches the skin during
shaving. The consumer benefits of these cartridge razors have been limited to mainly
safety, convenience, ergonomics, and/or control of blade geometry and have been driven
mainly by improvement to the cartridges.
[0004] Handles for razors that use replaceable cartridges have improved by better ergonomics
of handle grips, better cartridge attachment and detachment mechanisms, and the utilization
of multiple axes of rotation of the cartridge relative to the handle. Typically, these
improvements require additional components, including some of them that have prescribed
motion. These additional components often require tight tolerances with little room
for error. As a result, current approaches introduce complexities, costs, and durability
issues for manufacturing, assembling, and using such razors.
[0005] US 2017/173806 A1 discloses a biaxial razor including a shaving head, a handle, and a pivot assembly
arranged between the shaving head and the handle. The pivot assembly is composed of
a first axial driving group and a second axial driving group. The first and second
axial driving groups enable the shaving head to make both a rotating displacement
in a front-rear direction and a swing displacement in a left-right direction, so as
to fit with facial skins of users whose face contours are different, without taking
lots of arm motions in operations when shaving.
[0006] Additionally, recent advances in shaving razor handles that use replaceable cartridges
have enabled the delivery of other consumer experiential benefits from the handle
close to or onto the shaved surface. Such razor handles include liquid dispensing
razors and heated razors. Most of these razor handles have been adapted to fit cartridges
like those currently manufactured for existing premium system handles. These handle
and cartridge systems have many disadvantages, including being expensive to manufacture
- e.g. need heating elements in the cartridge and having poor handle ergonomics and
shave performance due to the interfaces between handle and cartridge and the large
contact area of shaving surfaces.
[0007] What is needed, then, is a better design or architecture of a cartridge and a razor
handle system that enables good core shaving performance, good product integrity and
safety, multiple axes of cartridge motion relative to the handle, easy attachment
and detachment of cartridge from the razor handle, and simple, reliable, and cost-effective
manufacturing when compared to existing razors. Such a design architecture would apply
to both powered and unpowered razors suitable for wet or dry shaving and to both durable
and disposable razor handles. Such a design may also apply to razors that delivery
of benefits from the handle close to or onto the skin.
SUMMARY OF THE INVENTION
[0008] According to the present invention, a razor handle is provided. The handle comprises:
a rigid member forming a frame;
a first member having one or more movable elements, wherein a portion of said first
member is connected to a first surface of said rigid member;
a second member, said second member coupled to a second surface of said rigid member
. A benefit delivery assembly for providing heating or cooling of the skin, and/or
for applying fluids to the skin is disposed in an area between said first and second
members, and the movable elements serve as a cartridge eject mechanism and are configured
to perform a rotational and/or linear movement.
[0009] The present invention is directed to a razor handle that includes a rigid member,
a first member having one or more movable elements wherein a portion of the first
member is connected to a first surface of the rigid member, a second member, the second
member coupled to a second surface of the rigid member wherein a benefit delivery
assembly is disposed in an area between the rigid member and the second member.
[0010] Unless otherwise defined, all technical and scientific terms used herein have the
same meaning as commonly understood by one of ordinary skill in the art to which this
invention belongs. Although methods and materials similar or equivalent to those described
herein can be used in the practice or testing of the present invention, suitable methods
and materials are described below. In addition, the materials, methods, and examples
are illustrative only and not intended to be limiting.
[0011] Other features and advantages of the invention will be apparent from the following
detailed description, and from the claims.
BRIEF DESCRIPTION OF THE DRAWINGS
[0012] While the specification concludes with claims particularly pointing out and distinctly
claiming the subject matter which is regarded as forming the present invention, it
is believed that the invention will be better understood from the following description
which is taken in conjunction with the accompanying drawings in which like designations
are used to designate substantially identical elements, and in which:
FIG. 1A is a perspective bottom view of a shaving razor in accordance with an embodiment
of the invention;
FIG. 1B is a perspective top view of a front of the shaving razor of FIG. 1A;
FIG. 1C is a front view of a blade cartridge unit shown in FIG. 1A and 1B;
FIGs. 1D-1E are graphical schematics of the handle and the blade cartridge unit of
the present invention;
FIGs. 1F-1H are schematic layouts of axes of motion in a perspective view of a razor
of the present invention;
FIG. 2 is a perspective top view of an embodiment of a handle of the present invention;
FIG. 3 is a perspective bottom view of the handle of FIG. 2;
FIG. 4 is a perspective top view of an alternate embodiment of a razor of the present
invention;
FIG. 5 is a perspective bottom view of the razor of FIG. 4;
FIG. 6 is a close-up view of a proximal end of a handle of the present invention;
FIG. 7A is a perspective top view of an embodiment of a handle of the present invention;
FIG. 7B is an exploded view of a razor of FIG. 7A;
FIG. 8A is a perspective top view of an embodiment of a handle of the present invention;
FIG. 8B is an exploded view of a razor of FIG. 8A;
FIG. 9A is a perspective top view of a portion of a frame of a handle according to
an embodiment of the invention;
FIG. 9B is a perspective bottom view of FIG. 9A;
FIG. 9C is an exploded view of FIG. 9A;
FIG. 9D is a close-up side view of a portion of the proximal end of a handle of the
present invention;
FIG. 9E is a close-up side view of a portion of the proximal end of a handle of the
present invention;
FIG. 9F is an exploded view of an embodiment of a movable member assembly of the present
invention;
FIG. 10 depicts lower elements of the movable member assembly of FIG. 9F;
FIGs. 11A-11B depict an upper element of the movable member assembly of FIG. 9F;
FIG. 12 depicts a portion of the movable member assembly of the present invention;
FIGs. 13A-13B depicts schematic views of embodiments of a frame of the present invention;
FIGs. 14A-14F depicts schematic views of an embodiment of a rigid member platform
of FIGs. 7A and 7B;
FIGs. 15A-15G depicts schematic views of an embodiment of a rigid member platform
of FIGs. 8A and 8B;
FIGs. 16A-16D depicts schematic views of embodiments of location features and their
use in accordance with the present invention;
FIGs. 17A-24B depicts a process of assembly of a portion of a handle according to
an embodiment of the invention;
FIGs. 25A-25D shows schematic representations of a trapezoidal prism-shaped element
of the present invention.
DETAILED DESCRIPTION OF THE INVENTION
Except as otherwise noted, the articles "a," "an," and "the" mean "one or more."
[0013] The present invention described herein involves a novel razor structure and method
of manufacturing such structure. The razor structure relates to the layering of functional
components, and the layering of one or movable members and assemblies, above and below,
a member of the handle that is made from a more rigid material than other portions
of the handle. Preferably, this rigid member forms a relatively thin and wide section
of the handle at least one or more of the functional assemblies above the rigid member
are connected directly to the member below through holes, openings or o a thin and
relatively wide section of the razor handle. This thin and relatively wide section
of the razor handle is typically more rigid than other large components in the handle
through choice of material and design. Functional assemblies of components such as
cartridge eject mechanisms and pivot mechanism can be attached above and below this
rigid member.
[0014] Existing razor designs place functional components within an internal cavity of a
rigid component of the razor handle. The advantage of the present invention's layering
of functional components and assemblies above and below a relatively wide and relatively
thin rigid member over existing razors includes the ability to incorporate large and
more complex functional components within those functional components and to manufacture
razors with a larger variety of improved consumer benefits in a simple, reliable,
and cost-effective manner.
[0015] This razor structure is also advantageous in providing consumers with a safe product
with good product integrity in case of accidental drops. Most existing handles weight
less than 56 grams and the majority weight less than 40 grams. As handles become more
complex and more premium in market tier, they tend to weigh more. The razor structure
of the present invention is well suited for handles that are two to three times heavier
than most razors commonly found on the market, specifically handles from about 57
grams to about 150 grams and preferably about 80 grams. Such a handle is considered
a "heavy" handle in the present invention.
[0016] The razor structure and methods of manufacturing the razor structure of the present
invention are also advantageous for non-limiting embodiments of razors described herein
that can provide benefits to a consumer's skin using a razor handle, where the razor
handle has a skin interconnect member through which benefits can be provided and such
that the skin interconnect member is in a pivotal relationship to the main body of
the handle. This skin interconnect member can be joined or fixed to the razor cartridge.
[0017] Other embodiments of razor structures and methods of manufacturing are contemplated
in the present invention such as those without skin interconnect members or pivoting
mechanisms.
[0018] The movable member or portion of the present invention is desirably disposed on a
razor structure or a component of a razor, preferably a handle.
[0019] The "main body" of the handle as used herein signifies the razor handle of the present
invention without the skin interconnect member 22. As shown in FIG. 2, the main body
16 includes a handle main section 21 and a handle transition section 23. The handle
transition section and a handle main section are coupled together to form a majority
of the main body of the handle. The handle transition section 23 can include a skin
interconnect member 22 which may not be part of the main body. The handle main section
can comprise a longitudinal section of the handle.
[0020] A "movable member" or "movable member assembly" as used herein signifies a member
comprised of one or more portions on the razor which are capable of moving or providing
a motion functionality for the razor. For instance, the movable member of the present
invention may preferably comprise portions which provide a pivot mechanism or a release
or ejection mechanism.
[0021] The term "spring", "spring mechanism", or "spring member" as used herein, signifies
any type of mechanical spring, such as a compression spring, a leaf spring, or any
feasible spring or combination thereof. A spring member of the present invention generally
has a loop shape. The term "loop" as used herein signifies a generally curved, circular
shape, which may form a loop. Non-limiting loops of the present invention comprise
oval, circular, elliptical, ring shape, substantially a V-shape, tear drop shape,
or any modification or combination thereof. The loop may be split and the loop itself,
the end portions or distal ends of the loop can be unconnected or free, unsupported,
connected or mounted, or overlap each other. The distal ends can be facing towards
each other or can be facing away from each other. A loop spring member of the present
invention, when straightened, desirably has an overall length of about 30 mm to about
90 mm.
[0022] The spring mechanism of the present invention is based on an interaction between
the portions of the movable member assembly (whether disposed on the cartridge or
the handle of the razor) and the spring member. During the pivot or eject functions,
the spring member offers a resistance that is a function of its preload compression,
its geometry and material, and the geometry of the carrier structure, and depending
on the intensiveness of that resistance, the effect will be larger or smaller.
[0023] The term "rigid member" as used herein signifies a member comprised of a hard metal
that can include a rigid member platform. The terms frame and rigid member of the
present invention can be used interchangeably herein. However, a secondary frame is
generally not a part of the rigid member of the present invention. The rigid member
can be a longitudinal portion in a handle main section. The rigid member platform
can accommodate a movable member assembly with one or more movable members disposed
thereon or therethrough. The frame 18 is desirably comprised of a hard metal. The
hard metal may be comprised of a diecast material. A nonlimiting example of a diecast
material of the present invention is zinc. Die-cast zinc materials include ZAMACK3,
ZAMACK5, and ZA8. Other suitable materials include glass fiber reinforced plastics
such as IXEF, stainless steel, aluminum, aluminum diecast, and magnesium diecast.
The rigid member or frame may be comprised of one material, preferably a strong metal,
but may be formed as two bodies that are then connected. In this case, it is preferable
that the rigid member platform is made of hard metal that is necessarily harder than
that of the rest of the frame.
[0024] The rigid member platform of the present invention can be a section of the rigid
member having a wide and thin profile relative to the overall rigid member. The movable
member assembly can be mounted above and below the rigid member platform. In the present
invention, a maximum width to median thickness ratio of the platform itself is about
7 to 60, and preferably about 20. The median thickness of the platform ranges from
about 0.5 mm to about 2.5 mm, and preferably about 1 mm. The area of the rigid member
platform including the area from features such as openings and pockets ranges from
about 50 mm
2 to about 700 mm
2, and is preferably about 300 mm
2. The rigid member platform has a hydraulic diameter, (e.g., in standard engineering
this diameter can be defined as about four times the area divided by the perimeter)
from about 8mm to about 50 mm, and preferably about 20 mm. The width of the rigid
member platform ranges from about 10 mm to about 50 mm. The length to thickness ratio
of the rigid member platform itself is 7 to 60, and preferably about 20.
[0025] Rigid members and rigid member platforms of the present invention are shown and described
with respect to FIGs. 13-15.
[0026] The term "location feature" as used herein signifies a feature such as an aperture
or opening, a slot, one or more protrusions, or any combination thereof. These features
provide a structure that enables travel of movable assemblies, to attach movable assemblies
or secondary frames to the rigid member or the rigid member platform, and they provide
attachment points for other rigid features to the rigid frame enhancing integrity.
[0027] In one embodiment of the present invention, the location feature is an aperture.
The feature may be disposed in a part of the frame (or rigid member), such as in the
rigid member platform, or in one or more, or all of the portions of the movable member
assembly of the razor structure present invention. In another embodiment of the present
invention, the location features are protrusions and apertures. The frame may be part
of a handle or may be part of a razor cartridge. The location feature is utilized
for aligning and coupling portions of the razor structure together by utilizing the
location feature in the frame and portions.
[0028] The term "benefit" or "benefit delivery assembly" or "benefit delivery system" as
used herein signifies something delivered to a user that is perceived to be advantageous.
In the case of a razor or hair removal device, the term benefit refers to a skin benefit.
Such a skin benefit cane be a heating or cooling of the skin. Another benefit to the
user is fluids (e.g., liquids) or waxes to the skin. Further, benefits may be provided
in combination, such as a benefit of heat and fluids. These may be advantageous to
a user by enhancing their shaving experience.
[0029] Referring to FIGS. 1A-1C, a shaving razor 10 of the present invention comprises a
handle 12 and a blade cartridge unit 15, which removably connects or releasably attaches
to the handle 12 and contains one or more blades 17 having cutting edges 33. The handle
12 can comprise a handle main section 21 that is used to grip the handle. The handle
12 can comprise a handle transition section 23 that connects the handle main section
21 to the blade cartridge unit 15. The blade cartridge unit 15 can be configured to
rotate about an axis of rotation A1 that is substantially parallel to the blades 17
and substantially perpendicular to the handle 12. As shown in the illustrated embodiments,
the razor can be configured to deliver benefits to the skin of the user by extending
the handle 12 through an opening 100 in the blade cartridge unit 15 to enable handle
benefit delivery components to be close to the skin.
[0030] In FIGS. 1D-1E, a graphical layout of the handle 12 and the blade cartridge unit
15 of the present invention is shown in a rest, undeflected, unloaded rest position.
In general, the skin contacting surface of the blade cartridge unit 15 usually lie
on or within a few millimeters of a cartridge plane P1 when the blade cartridge unit
15 is at its rest position. In general, a plane P2 may be oriented at an angle to
the cartridge plane P1 that lies along an approximate mid-plane of the handle main
section 21. This P1-to-P2 included angle between planes P1 and P2 may range from -60
degrees to +90 degrees. A narrower preferential range of the P1-to-P2 included angle
is -25 degrees to +25 degrees. The figures of the present invention show a P1-to-P2
included angle around +16 degrees. In general, a plane P3 may be oriented at an angle
to the main handle section midplane P2 that lies along an approximate mid-plane of
the handle transition section 21. This P2-to-P3 included angle between planes P2 and
P3 may range from -90 degrees to +90 degrees. A narrower preferential range of the
P2-P3 included angle is -90 degrees to + 45 degrees. The figures of the present invention
show a P2-to-P3 included angle of +21 degrees. In general, a plane P4 can be defined
perpendicular to planes P1, P2, and P3 that lies longitudinally along the handle 12
at the approximate mid-plane of the handle 12 and the blade cartridge unit 15.
[0031] Referring to FIGs. 1F, 1G, and 1H, additional axes of rotation or directions of linear
motion for various components of the handle can be generally defined using planes
P2, P3, and P4 as described in FIGs. 1D and 1E. An axis A2 along the handle main section
21 can be defined as the intersection of planes P2 and P4; and an axis A3 along the
handle transition section 23 can be defined as the intersection of planes P3 and P4.
Another axis A4 within the handle transition section 23 can be defined perpendicular
to plane P3 and laying upon plane P4. Another axis A5 within the handle main section
21 can be defined perpendicular to plane P1 and laying upon plane P4.
[0032] Two types of non-limiting embodiments of razors providing for a skin benefit are
disclosed herein. The first razor embodiment provides a benefit to the user by heating
or cooling the skin. The second razor embodiment provides a benefit to the user by
fluids (e.g., liquids) or waxes to the skin. It should be noted that many of the components
described in relation to the razor providing a benefit by heating and cooling the
skin can also be incorporated into a razor providing benefits by delivering fluids
and waxes to the skin. Both embodiments share common problems and have similar solutions
including the structural elements of the handle 12, the handle main section 21, the
handle transition section 23, and the skin interconnect member 22, the mechanisms
that enable skin interconnect member 22 to rotate about different combinations of
axes A1-A5, and the manufacturing of these components.
[0033] As shown in FIG. 1A, 1B, and 1C, this first razor embodiment can have a handle 12,
a blade cartridge unit 15 that can releasably attach to the handle 12 and can contain
one or more blades 17, and a heat delivery element which can deliver a heat skin benefit.
A portion of the handle 12 can extend through blade cartridge unit 15 and be exposed
as heating surface 82, discussed more fully below. As shown in FIG. 1A and in more
details in FIGS. 2 and 3 in which the blade cartridge unit 15 has been removed, thermal
surface 82 is a surface of a skin interconnect member 22 and can be used to deliver
a cooling or heating benefit to the user during shaving. Heating or cooling of the
skin interconnect member 22 can be achieved by pressing the skin benefit actuator
14, which can be a depressible button, a touch sensitive button, or a sliding button,
and which closes a powered circuit inside handle 12 to a circuit inside the skin interconnect
member 22. The handle 12 may hold a power source, such as one or more batteries (not
shown) that supply power to the handle skin interconnect member 22. Heating or cooling
of the skin interconnect member 22 can also be achieved passively such as by dipping
the skin interconnect member 22 into water at a different temperature than ambient.
In certain embodiments, the heat delivery element can comprise a metal such as aluminum
or stainless steel. In certain embodiments, the heat delivery element can comprise
a high capacity material such as metal or phase change materials. In certain embodiments,
the heat delivery element can comprise high thermal conductivity materials such as
copper, aluminum, or thermally conductive plastics such as COOLPOLY
® (trademark symbol). The razor handle disclosed herein can include the heat delivery
element disclosed co-owned, co-pending
US Application having a Docket No. 14532FQ.
[0034] In the illustrated embodiments, skin interconnect member 22 is configured to pivot
about axes A1 and A4. Other embodiments may be configured to move skin interconnect
member 22 about axes A1, A2, A3, A4, A5 or any combination thereof. The bearings,
which enable these rotary motions, may lie directly along an axis such as pin bearing
or a shaft, or they may offset from the axis of rotation, creating by a virtual pivot.
Virtual pivot bearings include shell bearings and linkages.
[0035] In a like manner, FIG. 4 shows another embodiment of a shaving razor that can deliver
a benefit by delivering a fluid or wax to the skin of the user. As shown in FIG. 5,
which shows the underside of the razor depicted in FIG. 4, a portion of the handle
12 can extend through blade cartridge unit 15 and be exposed as face 80, discussed
more fully below. As shown in FIGS. 4 and 5 and in more detail in FIG. 6 in which
the blade cartridge unit 15 has been removed, face 80 is a surface of a skin interconnect
member 22 and can have openings 78 through which a fluid can be dispensed for skin
comfort during shaving. Fluid flow from the reservoir in handle 12 can be achieved
by pressing the skin benefit actuator 14, which can be a depressible button, a touch
sensitive button, or a sliding button which activates a pumping mechanism 72 (shown
in FIG. 7B) to push fluid towards and through the skin interconnect member 22. The
pumping mechanism can include the compression of a flexible fluid reservoir, actuation
of a manual pump, or activation of a powered pump.
[0036] As shown in the illustrated embodiment of FIGS. 4-6, skin interconnect member 22
is configured to pivot about axis A1 as described in FIGs. 1F-1H. Alternate embodiments
can be configured to pivot about both axes A1 and A2 in a manner similar to the preceding
thermal benefit razor. Alternate embodiments can be configured to rotate about any
combination of axes A1, A2, A3, A4, and A5 using either virtual pivots or bearings
that lie directly along the axes.
[0037] The embodiments in FIGS. 1-6 show that the handle 12 can be configured to comprise
of a main body 16 and a skin interconnect member 22. As shown in FIG. 6, the main
body 16 and the skin interconnect member 22 may be connected by multiple components
including arms 24, bearings 30, springs (not shown), circuits, wires, and tubes 27.
When the skin interconnect member 22 pivots relative to the main body 16, these connecting
components may be configured to be flexible.
[0038] Referring now to FIGS. 7A-7B and 8A-8B respectively, an embodiment of a razor handle
which provides a benefit to the user by delivering fluids or waxes close to the skin
and an embodiment of a razor handle which provides a heat or cooling benefit is described
in more detail. It should be noted that many of the components described in relation
to the razor 10 providing a benefit from delivering fluids or waxes to the skin can
also be incorporated into a razor 10 providing for heating and cooling to the skin,
as they relate to the handle 12, the handle main section 21, the handle transition
section 23, and the skin interconnect member 22 pivoting about axis A1, described
herein, including their structural features, their connection features, their product
safety and integrity features, their manufacturing, their pivot motions, the spring
mechanisms that urge the pivots into a rest position and limit the range of motion,
and the shape of the pivoting handle head.
[0039] In FIGs. 7A-7B and 8A-8B, the handle 12 can comprise a main body 16 that can include
a main frame 18 and a secondary frame 20. The main body 16 including its component
main frame 18, an upper secondary frame 19, and lower secondary frame 20 members can
comprise durable materials such as metal, cast metal, plastic, impact-resistant plastic,
and composite materials.
[0040] The main frame 18 can be made of metal and can provide a significant portion of the
structural integrity of the handle. Preferably, the component main frame is made from
a light, stiff (high elastic modulus) and impact resistance material to minimize its
volume and maximize volume for other components while still providing product integrity
and safety. In an embodiment the frame 18 is made of zinc. In an embodiment the main
frame 18 is made of die-cast zinc. Diecast zinc materials include ZAMACK3, ZAMACK5,
and ZA8. Other suitable materials include glass fiber reinforced plastics such as
IXEF, stainless steel, aluminum, aluminum diecast, and magnesium diecast. The secondary
frame 20 can be made of a plastic material and can overlie most of the main frame
18 and provide for a significant portion of the size and comfort of the handle 12.
[0041] As shown in FIGs. 7A-7B and 8A-8B, the handle 12 can also comprise one or more movable
elements of a movable member assembly 44a mounted on the frame 18 that serve as a
cartridge eject mechanism. To enhance product integrity and safety of both the handle
and the cartridge during accidental drops, this cartridge eject mechanism is designed
to move in more than one direction from an initial rest position. Preferentially,
this movement type is a linear motion along an axis A2 or A3 towards the razor cartridge
to eject the cartridge and a linear motion along the same axis away from the cartridge
to mitigate damage and absorb energy during an accidental drop.
[0042] Continuing to refer to FIGs. 7A-7B and 8A-8B, a skin interconnect member 22 can be
connected to the main body 16 by one or more arms 24. Skin interconnect member 22
can pivot about an axis of rotation A4 that is defined by the connection of the skin
interconnect member 22 to pins 30 disposed at distal portions of arms 24. Blade cartridge
unit 15 attaches to the skin interconnect member 22 such that the blade cartridge
unit 15 can pivot on handle 12 to provide more skin contact area on the skin of a
user during shaving.
[0043] A benefit delivery system may be disposed above, below or through the frame. As shown
for instance in FIGs. 7B and 8B the benefit delivery systems 72, 201, and 14, 301
respectively are disposed in sections below the rigid member or frame 18. Advantageously,
the benefit delivery system is disposed between the rigid member and the secondary
frame. The secondary frame can be mounted to the frame.
[0044] The skin interconnect member 22 can have a shape beneficially conducive to both attaching
to the blade cartridge unit 15 and facilitating the delivery of a skin comfort benefit
from the handle 12 to and through the blade cartridge unit 15 attached to the handle
12.
[0045] The shape of the skin interconnect member 22 can alternatively be described as a
"funnel," or as "tapered," or a "trapezoidal prism-shaped." As understood from the
description herein, the description "trapezoidal prism" is general with respect to
an overall visual impression the skin interconnect member. For example, a schematic
representation of a trapezoidal prism-shaped element is shown and described in more
detail below with respect to FIG. 25.
[0046] The description "trapezoidal prism" is used herein as the best description for the
overall visual appearance of the skin interconnect member 22, but the description
does not imply any particular geometric or dimensional requirements beyond what is
described herein. That is, the skin interconnect member 22 need not have complete
edges or surfaces. Further, edges need not be unbroken and straight, and sides need
not be unbroken and flat.
[0047] The skin interconnect member 22 can have a shape beneficially conducive to both attaching
to the blade cartridge unit 15 and facilitating the delivery of a skin comfort benefit
from the handle 12 to and through the blade cartridge unit 15 attached to the handle
12.
[0048] As shown in FIGs. 9A-9B, a frame 18 and a fully assembled movable member assembly
44 operably coupled thereto are shown.
[0049] Various elements such as the grip members 39 and other features are removed from
the frame and/or handle, showing the frame 18 as a skeleton-like structure upon which
the movable member assembly 44 is disposed.
[0050] The frame desirably provides a base upon which other elements of a razor may be disposed.
The frame may be located substantially in the center of the handle 12. As shown in
the figures herein, ergonomic elements such as grip portions 39, protrusions or buttons,
and benefit-dispensing structures such as electronics, fluids, thermal elements, and
the like, may all be disposed on any side of the frame or within the frame 18 or within
the handle transition section 23.
[0051] The movable member assembly 44 is configured to have a rotational movement about
an axis of rotation A4 that is substantially perpendicular to the axis of rotation
A1 and substantially perpendicular to a longitudinal axes A2 or A3 of the razor 10.
The movable member assembly 44 or a portion thereof may be configured to have a linear
motion substantially parallel to the longitudinal or linear axes of movement A2 or
A3 that are substantially parallel to the frame 18. Linear axis of movement A3 is
substantially parallel to the handle transition section 23 and linear axis of movement
A2 is substantially parallel to the handle main section 21.
[0052] When the blade cartridge unit 15 is attached to the handle 12, the blade cartridge
unit 15 is configured to rotate about multiple axes of rotation, for example, a first
axis of rotation A1 and a second axis of rotation A4.
[0053] The movable member assembly 44 is configured to move in a first movement type and/or
a second movement type. A first movement type of the present invention comprises a
rotational movement and a second movement type comprises a non-rotational or linear
movement. Preferably, the rotational movement is about an axis of rotation A4 or axis
of rotation A1 or both (as shown in FIGs. 1F-1H), that is substantially perpendicular
to the frame 18 and the linear movement is along axes of movement A2 or A3 (as shown
in FIGs. 1F-1H) that is along a substantially straight or linear path which is substantially
parallel to the frame 18.
[0054] The frame 18 may be of any suitable size, shape, or configuration. Though shown as
being a part of the razor handle, the frame of the present invention may or may not
be part of the razor handle. If the frame 18 is part of the razor handle as shown
for instance in FIG. 1B, the frame 18 can desirably comprise a longitudinal member.
If the frame 18 is part of the handle transition section 23, the frame 18 can comprise
a member of any shape. If the frame 18 is a part of a razor cartridge or other component
(not shown), the frame may or may not be longitudinal. The frame preferably comprises
a rigid member and is preferably made of hard metal. The movable member assembly is
substantially comprised of plastic though some elements (e.g., spring members) may
be comprised of metal such as steel or stainless steel.
[0055] In FIGs. 9A to 9C, it is noted that the frame has an upper side 92a and a lower side
92b, a proximal end 96 and a distal end 98. Frame 18 is disposed in a novel manner
such that it extends between the movable member assembly 44 as will be described in
more detail below. In a preferred embodiment, upper and lower portions of the movable
member assembly are coupled to each other and within the frame.
[0056] FIG. 9A depicts a front perspective view showing the frame 18, frame upper side 92a,
and the upper portion 44a of the movable member assembly 44 along with arm portions
52 of the second lower element 49b.
[0057] FIG. 9B depicts a rear perspective view showing the frame 18, the frame lower side
92b and the lower portion 44b of the movable member assembly 44 along with second
and third lower elements, 49a and 49b, respectively, along with arm portions 52 of
the second lower element 49b.
[0058] The frame 18 also comprises a frame location feature 43. The rigid member or frame
location feature 43 of the present invention preferably comprises an aperture, though
a slot or other feasible structure or configuration or combination thereof is contemplated.
[0059] Aperture 43 shown in FIG. 9C is disposed at a proximal end 96 of the frame 18 and
serves as the location feature whose function will be described in further detail
below. The aperture 43 desirably comprises a circular shape, though any shape is contemplated
in the present invention. Accordingly, the aperture shape provides an aesthetic or
design element in addition to its utility. Further, though other apertures 45 are
present in the frame 18, the present invention describes the frame location feature
aperture 43 towards the proximal end 96.
[0060] In FIG. 9C, the frame 18 and the movable member assembly 44 are splayed out or disassembled
for purposes of showing various components and their arrangement together. The movable
member assembly 44 comprises an upper portion (44a) and a lower portion (44b). Upper
and lower portions may be an integral unit or they may be two or more units that are
coupled together. An upper portion 44a of the movable member assembly 44 is substantially
disposed on the upper side 92a of the frame and a lower portion 44b of the movable
member assembly 44 is substantially disposed on the lower side 92b.
[0061] The upper portion 44a of the movable member assembly 44 may move in both a first
movement type and a second movement type. In a second movement type (e.g., non-rotational,
linear), the upper portion may be comprised of a button such as an eject button which
serves to remove the blade cartridge unit 15 from the handle 12 when pushed.
[0062] In one embodiment, an upper portion 44a comprises a first upper element 47a, second
upper element 47b, a third upper element 47c and a fourth upper element 47d, all of
which are operably coupled to each other. The upper portion 44a may be comprised of
more or fewer elements and may be of any suitable size, shape or configuration in
accordance with the present invention.
[0063] Additionally, or alternatively the upper portion 44a includes upper portion location
features 46 in one or more of each upper element, and preferably in each upper element
where these features are all apertures, and more preferably these apertures are substantially
similar to the rigid member location feature 43, and most preferably substantially
circular shaped, though any feasible configuration of location features and shapes
are contemplated.
[0064] The first upper element 47a functions as a base structure for the upper portion 44a.
It preferably includes rails, tracks and/or projections. Desirably it is coupled to
one or more of the upper elements such as the second and third upper elements but
also one or more of the lower elements as will be described below. In one embodiment,
the first upper element 47a is comprised of a material that is less expensive and
more flexible to design with enabling more intricate features (e.g., snap fits, bearing
surfaces, etc.) in smaller volumes than would be possible if a rigid member were used
by itself without such an interface. Plastics or other flexible materials are contemplated
in the present invention for any elements that are most proximal or contacting a metal
rigid member. For instance, first upper element 47a can be made of plastic while the
rigid member is made of die-cast zinc material.
[0065] The second upper element 47b is preferably a spring member disposed in between a
first and third upper element 47c. The spring member is desirably disposed within
one or both first and third upper elements. As shown, the spring member can be a loop
or generally circular shape. This spring assists in providing a first or second movement
type. Preferably, element 47b provides a second movement type (e.g., linear).
[0066] The spring member of the present invention can be attached to the frame or rigid
member to provide for motion of the upper portion, lower portion, or a combination
thereof.
[0067] A spring member can have points of attachment between any elements within the movable
assembly 44 - i.e. any elements of the upper portion, any element of the lower portion,
and any combination thereof. At least one connection of the spring member is desirably
connected to either the frame 18, the first upper element 47a, or the first lower
element 49a. Connection to the rigid frame can provide a simpler design in smaller
volumes while connection to the either the first upper element or the first lower
can provide flexibility in design by allowing construction of complex mechanisms in
less room and at less cost than mounting them directly onto the frame 18.
[0068] A connection of the spring member directly to the frame 18 can provide smoother motions
and a less complex design when the upper portion 44a and the lower portion 44b are
connected and move together relative to the frame 18. A preload of the spring member
can be used to provide a better consumer experience by preventing the upper portion
44a and the lower portion 44b from rattling within the handle 12 and by either pushing
either the upper portion, lower portion, or combination thereof against a bearing
surface on the rigid member or by maintaining a clearance between the rigid member
and the upper portion and lower portion.
[0069] The third upper element 47c is preferably an eject button which desirably, coupled
with one or both of the second upper element 47b (e.g., spring member) and the first
upper element 47a (e.g., base structure), desirably provides a second movement or
a linear movement in a forward path along axes A2 or A3 (as shown in FIGs. 1F-1H)
to eject or separate the blade cartridge unit (e.g., unit 15 in FIGs. 1F-1H) from
the razor handle. A fourth upper element 47d comprises an outermost upper element,
and may be a dome shaped feature. The fourth upper element 47d generally provides
a finger pad area for comfortable placement of a user's finger for use with third
upper element (e.g., eject button) 47c, along with an aesthetic outer décor enhancement.
The fourth upper element may be a dome shape.
[0070] The lower portion 44b comprises a first lower element 49a, a second lower element
49b, and a third lower element 49c. The lower portion 44b may be comprised of more
or fewer elements and may be of any suitable size, shape or configuration.
[0071] Additionally, or alternatively, the lower portion 44b includes lower portion location
features 48 in one or more of each lower element, and preferably in each lower element
where these features are all apertures, and more preferably these apertures are substantially
similar to the rigid member location feature 43 and/or the upper portion location
features 46 and most preferably substantially circularly shaped, though any feasible
configuration of location features and shapes are contemplated.
[0072] First lower element 49a of the lower portion 44b is preferably comprised of a spring
member which is disposed in between a lower side of said frame or a lower side of
said first upper portion 47a and second lower element 49b. The spring member is desirably
disposed on the underside 92b of the upper frame 18a and/or within any of the elements
disposed on a lower side of said frame, such as the second lower element 49b but also
may be disposed on the lower side of said first upper element 47a (not shown). As
depicted, the spring member is comprised of a loop, V-shape, or a generally circular
shape.
[0073] Second lower element 49b of the lower portion 44b is preferably comprised of a bottom
base structure having tracks, rails, and/or projections and a pair of arms 52. The
pair of arms are preferably connected to an interconnect member for connection to
a blade cartridge unit or directly to a blade cartridge unit. When coupled with spring
member of first lower element 49a, the arrangement assists in providing a first or
second movement type, preferably, a first movement type (e.g., rotational). This first
movement type allows the blade cartridge unit 15, when connected to the handle 12,
to move or pivot in a rotational or side-to-side manner along axis of rotation A4.
[0074] Third lower element 49c comprises an outermost lower element, and may be a dome shaped
feature similar to fourth upper element 47d. The third lower element 49c generally
provides a bottom finger pad area for comfortable placement of a user's finger along
with an aesthetic outer décor enhancement.
[0075] FIG. 9D is a close-up side view showing the frame 18 disposed in between the movable
member upper and lower portions. Upper portion 44a is shown having dome 47d and eject
button 47c disposed on first upper element or a top pod 47a. First lower element 49a
and second upper element 47b (e.g., spring members) are not shown but are disposed
within lower and upper portions respectively. Second lower element 49b is disposed
below the frame 18.
[0076] FIG. 9E is a close-up perspective view of the movable member assembly 44 just prior
to being coupled together. All the elements of the upper portion 44a and lower portion
44b of the movable member assembly 44 are depicted without the frame 18. The elements
as they would be attached within the frame are shown clearly.
[0077] It should be noted that the bottom part 92 of first upper element 47a and the top
part 94 of the second lower element 49b are generally encompassed or covered by a
frame 18 towards proximal end 96 of the frame 18 as shown in FIG. 7.
[0078] FIG. 9F is a close-up exploded side view of the movable member assembly 44 without
the frame 18. The upper portion 44a is shown just as it would be coupled to the lower
portion 44b. Lower portion 44b is shown having a first lower element 49a, second lower
element 49b and arms 52 and upper portion 44a is shown having first upper element
47a and third upper element 47b. Second upper element 47b (e.g., spring member) and
fourth upper element (e.g., outer dome) are not shown in this view but are disposed
within the upper portion 44a.
[0079] FIG. 10 shows a top view 100 of the upper surface 101 of the second lower element
49b. As shown, the upper surface 101 of the second lower element 49b comprises one
or more tracks 102, projections 104, recesses 106, and rims 108. A first lower element
49a, which comprises a loop shaped spring member, is shown partially disposed within
a pair of curved tracks 102 of second lower element 49b. Third lower element 49c is
partly shown at the outer surface of the aperture 48.
[0080] FIGs. 11A and 11B depict upper and lower surfaces 111 and 112, respectively, of first
upper element 47a which is comprised of a base structure. These surfaces are comprised
of one or more tracks 113, projections 114, recesses 116, notches 117, and rims 118.
[0081] Desirably, the upper and lower portions 44a and 44b, respectively, are coupled to
each other. The engagement of the upper and lower portions may be achieved by mechanical
engagement such as a snap-fit engagement, chemical engagement such as adhesive or
glue, frictional engagement such as welding comprising ultrasonic welding such as
energy director or pinch-off welding, or torsional, spin, laser or hot-plate (e.g.,
mirror-imaged) type welding, or by any other feasible manner or any combination of
the foregoing, thereof.
[0082] In one embodiment of the present invention, the coupling is preferably achieved by
engaging one or more features of the lower surface of first upper element 47a with
one or more features of the upper surface of the second lower element 49b. For instance,
projections 104 on upper surface 101 of the second lower element 49b desirably engage
with recesses or notches in the lower surface 112 of first upper element 47a as shown
in a top view of a coupled arrangement 120 of second lower element 49b engaged with
first upper element 47a in FIG. 12. Additionally, or alternately, a preferred embodiment
of the present invention comprises welding, more preferably ultrasonic welding, and
most preferably pinch off type ultrasonic welding.
[0083] The area of engagement (e.g., a welding area or a mechanical engagement area) can
be located on external surfaces of upper and lower elements, can be located internal
to the elements (as shown in FIG. 18 below), or can be a combination. In one embodiment,
the area of engagement is not in contact with the frame 18. By not being in contact
with the frame, the portions of the movable member assembly can move independently
of the frame.
[0084] Once upper and lower portions are engaged and secured to each other, the movable
member assembly 44 can substantially function as an integral unit.
[0085] In the present invention, a single component, such as the upper portion 44a or the
lower portion 44b serves multiple functions. For instance, the lower portion 44b facilitates
an axis of rotation in a razor handle, namely an axis of rotation substantially perpendicular
to one or more blades when a razor is assembled and substantially perpendicular to
a frame of a handle. When rotated from an at rest position, the lower portion 44b
and for instance, the second lower element 49b can generate a return torque to return
to the rest position by way of the spring member 49a, such shown as a loop shaped
spring but may comprise a cantilever spring or a leaf spring. The return torque is
generated by the spring member of the second lower element 49b. Additionally, the
upper portion 44a also serves as a carrier for an ejector button assembly and may
also serve as a carrier for other components of a razor such as a docking structure
(not shown), and/or a blade cartridge unit (e.g., via the docking structure). In this
embodiment, the first lower element 49a (the spring member), can be attached to the
frame 18 providing optimal motion and clearances for the assembly.
[0086] In an alternate embodiment, the movable member assembly 44 is unitary and, optionally,
formed from a single material.
[0087] In FIG. 13A and 13B, location features of two embodiments 130a and 130b of frame
18 of the present invention are shown. In embodiment 130a, a frame 18 comprises a
rigid member platform 132a corresponding to the views shown in FIGs. 7A, 7B. In embodiment
130a, bottom side 92b of frame 18 comprises a rigid member platform 132a in the handle
transition section 23. The location feature of rigid member or frame 18 is an opening
43 in the rigid member platform 132. Protrusions 134 are disposed in the rigid member
platform 132. The protrusions can engage with other features such as arms 24 which
can be made of metal. Protrusions 134 of frame 130a can be used to attach a secondary
frame 20 to the frame 18.
[0088] As noted, the frame 18 of the present invention can be comprised of die-cast zinc
such as ZAMACK3, ZAMACK5, and ZA8. Other suitable materials include glass fiber reinforced
plastics such as IXEF 1032, stainless steel, aluminum, aluminum diecast, and magnesium
diecast.
[0089] Arms 24 of the present invention are shown in FIG. 6, 7A, 7B, 8A, 8B, and 16. With
a rigid member or frame 18 made of hard metal such die-cast zinc having features which
are coupled with hard metal arms (e.g., stainless steel), a robust product can be
made especially for a heavy handle and damage can be mitigated in case of accidental
drops.
[0090] In embodiment 130b, a frame 18 comprises a rigid member platform 132b corresponding
to the views shown in FIGs. 8A, 8B. In embodiment 130b, bottom side 92b of frame 18
comprises a rigid member platform 132b in the handle transition section 23. The location
feature of rigid member or frame 18 is an opening 43 in the rigid member platform
132. Protrusions 134 are disposed in the rigid member platform 132. Protrusions 134
of frame 130A can attach to a secondary frame 20 or components such as circuits or
benefit delivery systems. FIG. 15A-G shows close-up views of the rigid member platforms
132a and 132b.
[0091] In FIGs. 14-15, perspective and cross-sectional views of the rigid member platforms
132a and 132b of frame 130a and 130b, respectively, of FIG. 13 showing the thickness
and width of the rigid member platform of the present invention is depicted.
[0092] As shown in FIG. 14A, rigid member platform 132b has a top surface 142, bottom surface
143, walls 146, and location features including opening 43 and one or more slots 144.
The rigid member platform can be enclosed or partially enclosed by walls 146 (e.g.,
side walls).
[0093] As shown in FIG. 15, rigid member platform 132a has a top surface 142, bottom surface
143, walls 146, and location features including opening 43, one or more pockets 152,
and one or more protrusions 134. The rigid member platform can be enclosed or partially
enclosed by walls 146 (e.g., side walls).
[0094] FIG. 14 detail A shows a median thickness T1 of top and bottom surfaces 142 and 143
of the rigid member platform 132a and 132b. T1 is depicted in cross-sectional view
B-B taken down the midline of the rigid member platform as shown in detail A of FIG.
14.
[0095] FIG. 15 shows cross-sectional views A-A, C-C and D-D corresponding to the embodiments
of FIGs. 8A and 8B. In views A-A and C-C, median thicknesses T1 and T2 can be seen,
along with widths W1 and W2. In this embodiment, W1 represents the maximum width of
the rigid member platform and W2 is smaller than W1. In both cases, the maximum width
to median thickness ratio exceeds 20.
[0096] A maximum length L1 across the rigid member platform across cross-sectional view
E-E is shown parallel to the longitudinal axis of the razor handle. A maximum width
W1 across the rigid member platform is shown transverse to the longitudinal axis of
the razor handle. The rigid member platform 132 can be partially surrounded by walls
146 having a height T2. These walls provide additional product integrity to the rigid
member and allow for flexibility in design aesthetics. Embodiments of FIGs. 7A and
7B have a rotation pivot in the handle that passes or extends through the rigid member
platform. Bearing surfaces 149 are also depicted in detail A of FIG. 14. A clearance
C, of from about 0.1 mm to about 1 mm, is a distance between a bearing surface 149
and the top surface 142 or the bottom surface 143 of the rigid platform member. Bearing
surfaces 149 are located within a distance of about 1 mm from the location feature
such as slots, apertures, openings about which the movable member assembly travels.
[0097] Upper and lower portions of a movable member assembly are coupled together by passing
through the aperture 43 of the rigid member platforms and are held in position and
clearance by a spring member mounted to the rigid member. This spring member of the
present invention, while flexible in the desired direction of motion, is stiff enough
in other directions of motion to maintain sufficient clearance between portions of
the movable member assembly and the rigid member and rigid member platform. The spring
member may be preloaded as described herein.
[0098] In the present invention, a median thickness T1 of the platform 132a or 132b ranges
from about 0.5 mm to about 2.5 mm, preferably about 1 mm. A maximum width W1 to median
thickness T1 ratio of the platform itself is about 7 to 60, and preferably about 20.
The area of the rigid member platform including the area from features such as openings
and pockets ranges from about 50 mm
2 to about 700 mm
2, and is preferably about 300 mm
2. A perimeter of the rigid member platform can be about 40 mm to about 90 mm, and
preferably 63 mm. The rigid member platform has a hydraulic diameter, (e.g., in standard
engineering this diameter can be defined as about four times the area divided by the
perimeter) from about 8mm to about 50 mm, and preferably about 20 mm. The maximum
width W1 of the rigid member platform ranges from about 10 mm to about 50 mm. The
maximum length L1 to median thickness T1 ratio of the rigid member platform itself
is 7 to 60, and preferably about 20. The height T2 of the walls ranges from about
1.5 mm to about 18 mm, and preferably about 4 mm.
[0099] Thus, the present invention comprises a relatively thin rigid member platform which
is beneficial because it provides a robust support for complex functional members
above or below it, and an ease of manufacturing or assembly including flexibility
for use of other manufacturing techniques such as additive manufacturing, while also
providing space for benefit delivery system components.
[0100] FIG. 16A-B show views 169a and 169b depict the use of location features to attach
other components to the frame 18. Protrusion 161 in view 169a and 169b attach to locking
structures 162 in rigid arms 24 extending the rigidity of the frame 18 beyond the
main body 16. In view 169b, protrusions 163 of the rigid member platform assist in
locating and locking the secondary frame 20 to the rigid member platform 132a or 132b
utilizing secondary frame structures 164.
[0101] In a preferable embodiment of the present invention, these upper and lower elements
are coupled together by securing one to the other with the rigid member location feature
43. This may desirably be achieved by utilizing the rigid member location feature
aperture 43 of the frame 18 for alignment with the upper aperture 46 and lower aperture
48, as will be described in more detail below.
[0102] Referring to FIG. 17A-D, a process of the present invention for assembling the various
razor portions described above with respect to FIGs. 1 to 16 are shown and described
herein. Any of the mounting steps described can be achieved by any feasible methods
including, but not limited to, mechanical engagement, frictional engagement (e.g.,
welding), and chemical engagement (e.g., adhesives). The mechanical engagement can
include one or more structures or protrusions providing rest surfaces for a portion
or snap-fitting. Chemical engagement comprises gluing or adhesives.
[0103] In a preferred embodiment, at Step 1 of FIG. 17B a first lower element 49a of lower
portion 44b is first mounted to the main frame 18 of the handle 12. In a non-limiting
embodiment, the lower element 49a is a spring member, and can be a loop shaped spring
member as shown in FIG. 17. The loop shaped spring member can have a shape that is
generally oval, circular, elliptical, ring shaped, modified V-shaped, tear drop shape
or any combination thereof. In the embodiment shown, the loop shaped spring member
can be considered a tear drop shape. The spring member has end portions. End portions
can have distal ends which can be spaced apart. The mounting of the spring member
to the frame 18 can be achieved by attaching one end of the spring member amidst rest
surfaces on protrusions on the frame. In one embodiment, the loop spring member is
not permanently attached to the frame. The mounting of the spring member to the frame
may also be achieved by any feasible means including but not limited to, mechanical
engagement. The spring member can be preloaded within the second lower element and
the frame. In one embodiment, the spring member 49a comprises a knob or curved structure
171 which is placed around a center protrusion 172 such that an inner surface of the
knob (e.g., into the loop) rests along the outer surface of the center protrusion
172 while outer surfaces of the spring member 49a rest along surfaces of two elongated
protrusions 173a and 173b on either side of the center protrusion 172 as shown in
close-up views in Step 1 and Step 2. Close-up view of Step 1 depicts the center and
elongated protrusions of the frame. Close-up view of Step 2 depicts the underside
of the second lower element 49b, and together with FIG. 10, provide two feasible embodiments
for coupling the second lower element and the spring member. Also shown in FIG. 17
at Step 1, a skin interconnect member 22 is mounted to the main frame 18.
[0104] At Step 2 shown in FIG. 17, the second lower element 49b is mounted to the resultant
structure which forms a part of the lower portion, from Step 1. In one embodiment,
the second lower element 49b can provide a preload force on the spring member 49a
after it is mounted. The second lower element 49b can include arms which connect to
a razor cartridge as will be described herein. As noted above, the second lower element
49b can provide a rotational movement type for a razor cartridge relative to the handle.
In one embodiment, spring member 49a is fully encompassed or covered within lower
portion 44b.
[0105] Turning to FIG. 18, a Step 3 of the present invention process to assemble the movable
member 44 is shown. Step 3 depicts first upper element 47a of the upper portion 44a
disposed on top of the main frame 18 of handle 12. In one embodiment shown, a thermal
element 182 in the form of a flex circuit can be disposed therebetween. As shown,
the flex circuit has a circular shape with a centrally located aperture to align with
the location features of the other elements of the movable member assembly. The flex
circuit may provide a heat or cooling benefit to the skin interconnect member 22 which
can be appreciated by the user when attached to a razor cartridge. Close-up cross-sectional
views (A) of the structure resulting from Step 3 is shown in FIG. 18. There, it shows
that the first upper element 47a is disposed on top of second lower element 49b and
extends through the main frame 18. The main frame is disposed therebetween. Thermal
element 182 is disposed between the first upper element and the main frame.
[0106] At Step 4, the first upper element 47a is secured to the second lower element 49b.
This securing step is preferably comprised of welding between the two elements, more
preferably ultrasonic welding, and most preferably pinch off type ultrasonic welding.
The welded material 184 is shown in a close-up cross-sectional view (B) of Step 4.
As can be seen, the welded material 184 is disposed in area in between the first upper
element 47a and the second lower element 49b. Other methods for securing these elements
are also contemplated (e.g., gluing).
[0107] These elements are coupled together through the main frame which as noted herein
is preferably a rigid member, and more preferably comprised of a diecast material
such as zinc. Since the first upper element is a part of the upper portion and the
second lower element is a part of the lower portion, in this way, the upper portion
44a can be secured to the lower portion 44b through the main frame. In the embodiment,
the main frame extends between the upper and lower portions. In the embodiment, the
upper and lower portions are engaged within, pass through, or around the rigid member
or main frame's location feature 43. The upper and lower elements of the upper and
lower portions have location features 46, 48, respectively which are apertures of
a similar size and shape as that of the rigid member, a generally circular aperture.
[0108] The upper and lower elements can also feasibly be coupled via mechanical engagement
such as a snap-fit. Features on the upper surface of the second lower element 49b
and features on the lower surface 47a can be engaged within, pass through or around,
a rigid member location feature such as aperture 43 disposed within the rigid member.
The one or more surface features can be recesses, projections, notches, or other attachment
structures which can mate or engage, or any combination thereof.
[0109] Turning to FIG. 19, a Step 5 of the process of assembling of the movable member 44
is shown. At Step 5, distal ends of bracket arms 192 are mounted into skin interconnect
member 22. At Step 6 shown in FIG. 19, proximal arms of bracket arms 192 are mounted
to the second lower element 49b. After Step 6, the skin interconnect member 22 is
mounted to the second lower element 49b. A pivot spring member (not shown) can be
partially disposed within the skin interconnect member 22 to pivot in relation to
arms 192. The pivot spring member can be preloaded.
[0110] Pivot spring member can be any spring member facilitating biasing and pivoting of
the pivoting. Pivot spring member can be, for example, any of torsion coil springs,
coil spring, leaf spring, helical compression spring, and disc spring. In one embodiment,
spring member comprises one or more coil springs. In an embodiment, two coil springs
can be coupled together in a spaced relationship by a main bar portion. Pivot spring
members are described in co-owned co-pending US Docket Nos. 15136P, 15137P, 15138P.
[0111] In FIG. 20A at Step 7, bracket arms 192 are fixed into position within the second
lower element. In a non-limiting embodiment, as also shown by the direction of the
arrows in the partial cut away perspective view of FIG. 20, a process of cold stamping,
cold press fit, or cold heading can drive staking pins into the second lower element
to fix the bracket arms 192 in position.
[0112] Portions of the main frame 18 corresponding to openings 194 of arms 192 can be permanently
deformed by pressing into the openings 194. The operation, known as cold stamping
or cold staking, permits secure coupling of arms 192, and therefore, skin interconnect
member 22, to main frame 18 (and therefore, handle 12). Cold stamped pockets 202 can
be formed after the cold stamping is completed as shown in FIG. 20.
[0113] In FIG. 21, Step 8 is shown to include the attachment of the third lower element
49c onto second lower element 49b and through the location features or apertures 48.
The third lower element 49c is a dome shaped element having a rim 214 and a dome aperture
48. The dome aperture may or may not be the same size and shape as the other location
features in the razor. The dome element 49c is disposed within and through location
feature 48 of the second lower element 49b and the rim extends to the upper surface
of the first upper element 47a as shown in cross-sectional cut out close-up view (A)
in FIG. 21. At step 9, the upper rim 214 of the dome element 49c is crimped onto the
first upper element 47a. Crimp areas 212 are shown by arrows in the cross-sectional
cut out close-up view (B) of FIG. 21. Alternately, the rim may be crimped onto any
element of the upper portion 44a or it may be otherwise attached to the frame 18.
[0114] FIG. 22 shows a third upper element 47c in the form of an eject button for a razor.
The top side 222 of the eject button is cleaned at Step 10. In one non-limiting embodiment,
the top side of the third upper element button is cleaned using plasma. At Step 11,
the underside 224 of the fourth upper element 47d is also cleaned. In a non-limiting
embodiment, the underside of the dome shaped element is cleaned with alcohol. At Step
12, the top side surface of the eject button element is prepared so that the underside
of the dome shaped element can be mounted thereon. In a nonlimiting embodiment, Step
12 comprises an adhesive or glue applied to a gluing area 226 on the top side 222
of the third upper element eject button 47c as shown in FIG. 22. At Step 13 the underside
of the dome shaped element is mounted on the gluing area 226 and once the dome element
is placed on the top side of the eject button, the glue secures elements 47c and 47d
together. A lower rim portion of element 47d can extend through the aperture 46 of
the eject button.
[0115] FIG. 23 depicts the mounting of second upper element 47b onto the underside of the
third upper element 47c. Second upper element 47b is a spring member and third upper
element 47c is an eject button element. In a non-limiting embodiment, the spring member
can be a loop shaped spring member as shown in FIG. 23. The loop shaped spring member
can have a shape that is generally oval, circular, elliptical, ring shaped, modified
V-shaped, tear drop shape or any combination thereof. In the embodiment shown, the
loop shaped spring member can be considered a circular shape. The spring member has
end portions. End portions can overlap as shown. The mounting of the spring member
to the eject button 47b at Step 14 can be achieved by attaching one portion of the
spring member amidst rest surfaces on protrusions on the button. In one embodiment,
the loop spring member is not permanently attached to the eject button. The mounting
of the spring member to the button may also be achieved by any feasible means including
but not limited to, other types of mechanical engagement. The spring member can be
preloaded within the button. In one embodiment, the spring member 47b comprises a
knob or curved structure 232 which is placed around a center protrusion 234 such that
an inner surface of the knob (e.g., into the loop) rests along the outer surface of
the center protrusion 234 while outer surfaces of the spring member 47b rest along
surfaces 235 of two elongated protrusions 236a and 236b on either side of the center
protrusion 234 as shown in close-up views (A) and (B) in FIG. 23. Close-up view (B)
depicts the center and elongated protrusions of the underside of the button. Close-up
view (A) depicts the other rest surfaces 237 on protrusions 238 of the underside of
the button 47c. Together, FIG. 23 and FIG. 23 provide two feasible embodiments for
coupling the third upper element (e.g., eject button) and the spring member.
[0116] FIG. 24 depicts the Step 15, a last step for the assembly of the movable member assembly.
In Step 15, the resultant coupled eject button assembly, inclusive of elements 47b,
47c, and 47d, of FIG. 23 are mounted to the upper surface of first upper element 47a
which was previously mounted to the frame in Steps 3 and 4 of FIG. 18. In one embodiment,
the mounting Step 15 is achieved via a snap fit mechanism between features on the
lower surface of eject button 47c and features on the upper surface of first upper
element 47a. These features can provide proper button assembly into the razor. For
instance, protrusions 242 can include chamfer surfaces 244. These chamfers 244 can
apply a pre-loading force to release the spring member from the eject button assembly
rest position. Other surface features 246 on the lower side of the eject button assembly,
as shown in the close-up view in FIG. 24, can limit vertical or sideways movement
to guide the eject button. Once the last step 15 occurs, the spring member 47b can
be fully encompassed within upper portion 44a.
[0117] It should be noted that at least one or more elements of the upper or lower portions
do not move relative to the rigid member. For instance, the lower portion may include
an element that does not move relative to the rigid member.
[0118] The frame, movable member assembly with upper and lower portions comprising an ejector
button assembly, and a rotational movement unit (second lower element 49b) are configured
for simplification of assembly, for example, in high-speed manufacturing. Each component
is configured to automatically align and to securely seat. In an embodiment, each
component engages to another component in only a single orientation such that the
components cannot be inaccurately or imprecisely assembled. Further, each component
does not need an additional step of dimensional tuning or any secondary adjustment
in manufacturing to ensure proper engagement with other components. The design of
the handle also provides control and precision. For example, when the razor is assembled,
the movable member and/or the blade cartridge unit is substantially centered, the
preload of the springs may be controlled precisely over time even after repeated use,
and the performance of each spring, is controlled, consistent, and robust.
[0119] FIG. 25 show schematic representations of trapezoidal prism shapes of the skin interconnect
member of the present invention. The shape of the at least one skin interconnect member
22 can alternatively be described as a "funnel," or as "tapered," or a "trapezoidal
prism-shaped." As understood from the description herein, the description "trapezoidal
prism" is general with respect to an overall visual impression the pivoting head.
For example, FIG. 25 shows schematic representations 123A and 123B of trapezoidal
prism-shaped elements and shows a shape having a relatively wide upper face (or opening)
325, a relatively narrow lower face 324, two long major faces 326, and two end faces
328 that are generally trapezoidal-shaped. FIG. 25 also shows a close-up side view
123C of one embodiment of the skin interconnect member 22 of the handle of the present
invention showing a generally trapezoidal prism or prism-like shape 345 of the skin
interconnect member 22 and an isolated view 124D of components of one embodiment of
skin interconnect member 320 that create a general "trapezoidal prism" shape.
[0120] The various elements of the movable member assembly are desirably formed of plastics,
including thermoplastic elastomers. The spring members can be made of plastic, impact-resistant
plastic, metal, and composite materials. In an embodiment, the spring member can be
made from materials that are resistant to stress relaxation such as metal, polyetheretherketone,
and some grades of silicone rubber. Such an embodiment of spring member, comprised
of stress relaxation resistant materials, can prevent the pivot head from undesirably
taking a "set," a permanent deformation of the spring member that prevents the pivot
head from returning to its rest position when unloaded. In an embodiment, spring member
can be made of 200 Series or 300 Series stainless steel at spring temper per ASTM
A313. In an embodiment, spring member can be comprised of stainless steel wire (e.g.,
302 stainless steel wire) having an ultimate tensile strength metal greater than 1800
MPa or an engineering yield stress between about 800 MPa and about 2000 MPa.
[0121] Arms 24 or frame 18 can be made of plastic, impact-resistant plastic, metal, and
composite materials. In an embodiment, arms 24 and frame 18 can be comprised of metal.
Arms 24 and frame 18 can be made of a 200 or 300 Series stainless steel having an
engineering yield stress measured by ASTM standard E8 greater than about 200 MPa,
and preferably greater than 500 MPa and a tensile strength again measured by ASTM
standard E8 greater than 1000 MPa.
[0122] Arms 24 and frame 18 can be made of a zinc die-cast with an engineering yield stress
of about 200 MPa measured by ASTM standard E8 and a tensile strength again measured
by ASTM standard E8 about 300 MPa.
[0123] Preferably, the assembly is formed from thermoplastic polymers. For example, nonlimiting
examples of materials for the movable member with desirable properties, such as flexibility,
durability (breakdown from drop impact), fatigue resistance (breakdown from bending
over repeated use), and creep resistance (relaxing of the material), can include POLYLAC
® 757 (available from Chi Mei Corporation, Tainan, Taiwan), HYTREL
® 5526 and 8283 (available from E. I. DuPont de Nemours & Co., Wilmington, Delaware),
ZYTEL
® 122L (available from E. I. DuPont de Nemours & Co., Wilmington, Delaware), CELON
® M90 (available from Ticona LLC, Florence, Kentucky), PEBAX
® 7233 (available from Arkema Inc., Philadelphia, Pennsylvania), CRASTIN
® S500, S600F20, S600F40, and S600LF (available from E. I. DuPont de Nemours & Co.,
Wilmington, Delaware), CELENEX
® 1400A (M90 (available from Ticona LLC, Florence, Kentucky), DELRIN
® 100ST and 500T (available from E. I. DuPont de Nemours & Co., Wilmington, Delaware),
HOSTAFORM
® XT 20 (available from Ticona LLC, Florence, Kentucky), and SURLYNG 8150 (available
from E. I. DuPont de Nemours & Co., Wilmington, Delaware). Furthermore, the selection
of a material may affect the stiffness and yield stress of the movable member or a
spring. For example, each material may have different stiffnesses depending on the
temperature and rate of rotation of the upper or lower portions of the movable member
relative to the frame. Dimensions of the spring elements can be varied to achieve
a desired torque and/or a desired stiffness.
[0124] Other components of the handle, blade unit, and other rigid plastic parts of the
shaving system can be made of any suitable material including, for example, polyethylene
terephthalate (PET or PETE), high density (HD) PETE, acrylonitrile butadiene styrene
(ABS), thermoplastic polymer, Polypropylene, oriented polypropylene, polyurethane,
polyvinyl chloride (PVC), polytetrafluoroethylene (PTFE), polyester, high-gloss polyester,
or combinations thereof.
[0125] It should be understood that every maximum numerical limitation given throughout
this specification includes every lower numerical limitation, as if such lower numerical
limitations were expressly written herein. Every minimum numerical limitation given
throughout this specification includes every higher numerical limitation, as if such
higher numerical limitations were expressly written herein. Every numerical range
given throughout this specification includes every narrower numerical range that falls
within such broader numerical range, as if such narrower numerical ranges were all
expressly written herein.
[0126] The dimensions and values disclosed herein are not to be understood as being strictly
limited to the exact numerical values recited. Instead, unless otherwise specified,
each such dimension is intended to mean both the recited value and a functionally
equivalent range surrounding that value. For example, a dimension disclosed as "40
mm" is intended to mean "about 40 mm."